Ключевые слова: america, american, anatidae, animal, animals, anseriformes, asia, asian, aves, aythya, aythya nyroca, aythyinae, bird, birds, duck, ducks, eurasia, eurasian, europe, european, fauna, ferruginous duck, ferruginous pochard, lake, natural, nature, north africa, north african, one, one animal, pochard, pochards, swim, swimming, water, wild, wild animal, wild life, wildlife, zoo,